CN101404400A - Heavy ice area dual-loop co-column tension-resistant power transmission iron tower - Google Patents
Heavy ice area dual-loop co-column tension-resistant power transmission iron tower Download PDFInfo
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- CN101404400A CN101404400A CNA200810233588XA CN200810233588A CN101404400A CN 101404400 A CN101404400 A CN 101404400A CN A200810233588X A CNA200810233588X A CN A200810233588XA CN 200810233588 A CN200810233588 A CN 200810233588A CN 101404400 A CN101404400 A CN 101404400A
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Abstract
The invention discloses a heavy ice area double-loop tension-resistance type iron tower. In the invention, the iron tower is divided into three layers of crossarms which are a groundwire crossarm (3), an upper lead crossarm (4) and a lower lead crossarm (5) in turn from up to down; the three layers of crossarms are arranged at the two sides of a tower body and are arranged on the same vertical surface; the leads of the two loop phases are respectively arranged at the two sides of the tower body in a Delta shape; the upper lead crossarm is used for hanging the lead (6)of an upper phase; the lower lead crossarm is used for hanging the leads (7) and (8) of a lower phase. The heavy ice area double-loop overhanging type iron tower has the remarkable advantage of leading the double loops of the same tower to be realized in the heavy ice area. The heavy ice area double-loop tension-resistance type iron tower has the remarkable advantages of less tower material consumption, small occupied area of a tower base as well as economy and practicability; moreover, after the height of the iron tower is increased, the lightening resistance level of a transmission line is not reduced and the trip-out rate of lightening shock is also reduced, thus being beneficial to the stable and safe running of an electric network; moreover, the heavy ice area double-loop tension-resistance type iron tower can be applied on the heavy ice area.
Description
Technical field
The invention belongs to a kind of transmission facility iron tower structure, especially a kind of brand-new same tower double back transmission line iron tower structure of using at heavy icing area.
Background technology
At present, the dual-loop co-column tension-resistant sections tower of China's transmission line use is light ice formation, middle ice formation conventional type or compact iron tower.Existing conventional type and compact double loop iron tower are because phase conductor employing vertical arrangement and phase spacing are less, and the load character of not considering electrical characteristic such as flashover and heavy icing area iron tower between heavy icing area transmission line phase conductor, can not be applied to the heavy icing area transmission line.
As shown in Figure 1, iron tower phase conductor in existing conventional double loop adopts vertical arrangement.The heavy icing area circuit since icing inhomogeneous, do not deice the same period and lead deices situations such as jump, can make that the lead that is arranged above and below is approaching, thereby cause flashover fault.According to the operating experience of existing transmission line, the conventional double loop iron tower of vertical arrangement can not effectively reduce or avoid the flashover fault between lead.If vertical range between the increase phase conductor or horizontal displacement, now very high conventional double loop iron tower is higher with making, strengthen the tilting moment of iron tower, the very big load that iron tower bears when satisfying the electric wire icing, the tower material consumption of single basic iron tower can be very big, the column foot floor space also can increase, and is uneconomic.And after the iron tower height increased, the lightning withstand level of transmission line reduced, and tripping rate with lightning strike also increases thereupon, was unfavorable for stable, the safe operation of electrical network.
As shown in Figure 2, the existing compact double loop iron tower phase conductor employing shape of falling the Δ is arranged.In order to reach the bigger purpose of compact line nature transmission power, phase spacing must be limited in the certain limit.For example, generally between 6.7m～8m, the technical stipulation and the rules requirement of discontented lumping weight ice formation transmission line up to now, still do not have the precedent at heavy icing area utilization compact transmission line and compact iron tower to the phase spacing of 500kV transmission line.
Summary of the invention
The present invention aims to provide a kind of common-tower double-return road strain resistant iron tower of the new structure that uses at heavy icing area, it is heavy icing area common-tower double-return road important component part, realize promoting the use of 100% common-tower double-return road transmission line at heavy icing area, reach the purpose of problems such as saving transmission line corridor and solution transmission line corridor anxiety.
The heavy ice area dual-loop strain resistant iron tower that the present invention proposes is in order to cooperate with heavy ice area dual-loop suspended pattern iron tower, and the arrangements of conductors in every loop arranges that also will be Δ arranges; Heavy ice area dual-loop strain resistant iron tower comprises three layers of cross-arm, and it is followed successively by ground wire cross-arm, upper conductor cross-arm, and lower wire cross-arm from top to bottom, is distributed in the body of the tower both sides and on same vertical plane, and the both sides that two return wires are arranged in body of the tower are Δ and arrange; This upper conductor cross-arm is used to hang phase conductor, and this lower wire cross-arm is used to hang down phase conductor (every loop line road two-phase).The electric pressure that the transmission line of iron tower of the present invention adopts is 220kV, 330kV and 500kV; The phase conductor that the present invention hangs comprises the lead of four kinds of patterns such as single conductor, double bundle conductor, tripartition lead, conductors on quad bundled.
Wire jumper string of the present invention adopts the V-arrangement insulator string of arranging perpendicular to line direction, reduces wire jumper ice insulator sudden strain of a muscle accident, simultaneously, suppresses the drainage thread offset amplitude, is beneficial to restriction drainage thread windage yaw and deices jump the tower material is discharged.
The three-phase conducting wire in the same loop of the present invention adopts Δ shape to arrange, two layer conductor cross-arms, the lower wire cross-arm is hung two phase conductors on every loop line road, reduces tilting moment (with respect to reducing about 20% for the vertical arrangement) and torsional moment (reducing about 33% for horizontally) that iron tower bears; By structural adjustment, reduce requirement and the tower material use quantity of iron tower to tower material specification; Make iron tower height and circuit width of corridor obtain fine coordination.The present invention is a kind of electric power pylon that applies to the dual-loop co-column of heavy icing area, and itself and heavy icing area suspended pattern common-tower double-return road iron tower are used, and bear the task that heavy icing area transmission line corner and strain insulator cut-off.
The invention has the beneficial effects as follows that tower material consumption is little, the column foot floor space is also little, and is economical and practical; And after the iron tower height increased, the lightning withstand level of transmission line did not subtract, and tripping rate with lightning strike also decreases, and was beneficial to stable, the safe operation of electrical network, and can uses compact transmission line and compact iron tower at heavy icing area.
Further set forth content of the present invention below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is a conventional strain resistant common-tower double-return road iron tower structural representation.
Fig. 2 is a compact strain resistant common-tower double-return road iron tower structural representation.
Fig. 3 is a heavy ice area dual-loop co-column tension-resistant power transmission iron tower structural representation of the present invention.
[figure number explanation]
1 body of the tower, 2 tower heads
3 ground wire cross-arms, 4 upper conductor cross-arms
Phase conductor on the 5 lower wire cross-arms 6
7,8 times phase conductor 9 strain insulator-strings
10V shape wire jumper string 11 drainage threads
Embodiment
See Fig. 3, having the present invention includes heavy ice area dual-loop iron tower body of the tower 1, tower head 2 and every loop line road phase conductor Δ arranges, it is characterized in that: iron tower is set to three layers of cross-arm, it is followed successively by ground wire cross-arm 3, upper conductor cross-arm 4 and lower wire cross-arm 5 from top to bottom, be distributed in the body of the tower both sides and on same vertical plane, the both sides that two return wires are arranged in body of the tower are Δ and arrange; This upper conductor cross-arm 4 is used to hang phase conductor 6, and this lower wire cross-arm 5 is used to hang down phase conductor 7,8; The electric pressure that the transmission line of iron tower of the present invention adopts is 220kV, 330kV and 500kV; The phase conductor that the present invention hangs comprises the lead of four kinds of patterns such as single conductor, double bundle conductor, tripartition lead, conductors on quad bundled.9 is strain insulator-string among the figure, and 10 is V-arrangement wire jumper string, and 11 is drainage thread.
The place that the heavy ice area dual-loop strain resistant iron tower that the present invention proposes is applied to heavy icing area transmission line corner and needs strain insulator to cut-off is the necessary complement to the heavy ice area dual-loop suspended pattern iron tower that is applied to the transmission line linear position.
When two single back lines were changed on the common-tower double-return road into, the heavy ice area dual-loop strain resistant iron tower that the present invention proposes was because arrangements of conductors is comparatively approximate with the dried font single loop of heavy icing area strain tower commonly used now, so, can obtain good fiting effect.
Layout between the phase conductor and gap size determined by factors such as electric pressure, span, height above sea level and design ice covering thickness, should be able to avoid or reduce between the lead, between the lead wire and earth wire and lead to iron tower at inhomogeneous icing, do not deice and deice flashover under the situation such as jump the same period.With the 500kV circuit is example, and two lower wire phase spacings are generally between 11m～16m; Last phase conductor should be positioned over down on the perpendicular bisector of two phase conductors or near, vertical range should not be less than 10m.
Tower material design and selecting must be satisfied heavy ice area dual-loop iron tower bearing capacity to variable and permanent load at icing and when deicing.The iron tower body of the tower is preferably square structure, and full tower design should be able to be resisted the moment of flexure and the moment of torsion of inhomogeneous ice load, lead, the ground wire broken string, and other loading conditions of bearing rules, code requirement.
The design of Grounding Connections ice covering thickness should be greater than wire icing thickness 5mm～10mm.
Claims (3)
1, heavy ice area dual-loop strain resistant iron tower, including body of the tower (1), tower head (2) and every loop line road phase conductor Δ arranges, it is characterized in that: iron tower is set to three layers of cross-arm, it is followed successively by ground wire cross-arm (3), upper conductor cross-arm (4) and lower wire cross-arm (5) from top to bottom, be distributed in the body of the tower both sides and on same vertical plane, the both sides that two loop phase conductors are arranged in body of the tower are Δ and arrange; This upper conductor cross-arm (4) is used to hang phase conductor (6), and this lower wire cross-arm (5) is used to hang down phase conductor (7), (8).
2, heavy ice area dual-loop strain resistant iron tower as claimed in claim 1 is characterized in that: the electric pressure that the transmission line of iron tower adopts is 220kV, 330kV and 500kV.
3, heavy ice area dual-loop strain resistant iron tower as claimed in claim 1, it is characterized in that: the phase conductor of suspension comprises the lead of four kinds of patterns such as single conductor, double bundle conductor, tripartition lead, conductors on quad bundled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810233588XA CN101404400A (en) | 2008-11-17 | 2008-11-17 | Heavy ice area dual-loop co-column tension-resistant power transmission iron tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA200810233588XA CN101404400A (en) | 2008-11-17 | 2008-11-17 | Heavy ice area dual-loop co-column tension-resistant power transmission iron tower |
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| Publication Number | Publication Date |
|---|---|
| CN101404400A true CN101404400A (en) | 2009-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA200810233588XA Pending CN101404400A (en) | 2008-11-17 | 2008-11-17 | Heavy ice area dual-loop co-column tension-resistant power transmission iron tower |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882767A (en) * | 2010-04-15 | 2010-11-10 | 河南省电力公司信阳供电公司 | Stringing method of high-tension overhead line |
| CN102751687A (en) * | 2012-07-12 | 2012-10-24 | 国核电力规划设计研究院 | Drainage armour clamp of high voltage alternative current circuit tension resisting tower |
| CN102817491A (en) * | 2012-08-08 | 2012-12-12 | 邯郸供电公司 | 110kV dual-loop line drilling iron tower |
| CN103293012A (en) * | 2013-04-28 | 2013-09-11 | 国家电网公司 | Method using static force scale model to test power transmission tower |
| CN107104392A (en) * | 2017-05-24 | 2017-08-29 | 武汉理工大学 | A kind of Distributed Power Flow controller installation method suitable for overhead transmission line |
-
2008
- 2008-11-17 CN CNA200810233588XA patent/CN101404400A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101882767A (en) * | 2010-04-15 | 2010-11-10 | 河南省电力公司信阳供电公司 | Stringing method of high-tension overhead line |
| CN101882767B (en) * | 2010-04-15 | 2013-01-23 | 河南省电力公司信阳供电公司 | Stringing method of high-tension overhead line |
| CN102751687A (en) * | 2012-07-12 | 2012-10-24 | 国核电力规划设计研究院 | Drainage armour clamp of high voltage alternative current circuit tension resisting tower |
| CN102751687B (en) * | 2012-07-12 | 2015-04-15 | 国核电力规划设计研究院 | Drainage armour clamp of high voltage alternative current circuit tension resisting tower |
| CN102817491A (en) * | 2012-08-08 | 2012-12-12 | 邯郸供电公司 | 110kV dual-loop line drilling iron tower |
| CN103293012A (en) * | 2013-04-28 | 2013-09-11 | 国家电网公司 | Method using static force scale model to test power transmission tower |
| CN107104392A (en) * | 2017-05-24 | 2017-08-29 | 武汉理工大学 | A kind of Distributed Power Flow controller installation method suitable for overhead transmission line |
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Open date: 20090408 |